Light scattering and viscoelasticity of aggregating and gelling κ-carrageenan

被引：52

作者：

Meunier, V

Nicolai, T ^{[1
]}

Durand, D

Parker, A

机构：

[1] Univ Maine, CNRS, UMR 6515, F-72085 Le Mans 9, France

[2] SKW Biosyst, Ctr Rech, F-50500 Carentan, France

来源：

MACROMOLECULES | 1999年 / 32卷 / 08期

关键词：

D O I：

10.1021/ma981319v

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

We have studied the evolution in time of the shear modulus and the scattered light intensity of aqueous kappa-carrageenan solutions at various concentrations and temperatures. Aggregation was induced by cooling solutions containing 0.01 M KCl. The ionic strength of the solutions was fixed by adding 0.1 M NaCl. The time dependence was found to be similar at all concentrations and temperatures investigated. Equilibrium was not attained even after 12 h maturation. The temperature dependence is mainly kinetic and diverges at a temperature close to the temperature of the coil-helix transition of kappa-carrageenan. Varying the concentration influences both the aggregation kinetics and the strength of the gels. No critical minimal concentration for gelation is observed.

引用

页码：2610 / 2616

页数：7

共 38 条

[1]

AMAT MA, 1989, OCEANIS S D, V15, P661

[2]

X-RAY DIFFRACTION STUDIES OF POLYSACCHARIDE SULPHATES - DOUBLE HELIX MODELS FOR K-AND L-CARRAGEENANS [J].